ASHBURN, Va. -- Washington Redskins cornerback David Amerson was limited in practice, three days after suffering a concussion in the 31-16 loss at the Dallas Cowboys on Sunday. But Redskins coach Mike Shanahan said he's hopeful that Amerson will be fine Thursday.

Amerson said earlier on Wednesday that he has not felt any lingering affects from the concussion, which occurred thanks to a blindside hit on a second-half kick return. The Redskins can't afford to lose Amerson in a week where they're facing two big receivers in 6-foot-4 Brandon Marshall and 6-foot-3 Alshon Jeffery. At 6-foot-1, Amerson is the Redskins' tallest corner.